-99.61% is the change from 517 to 2
Calculation steps:
[( 2 - 517 ) ÷ 517] x 100 = -99.61%
Formula
Percentage change = [(2 - 517) / 517] x 100
Subtract the new number by the original number
2 - 517 = -515
-515 ÷ 517 = -0.9961315280464217
-0.9961315280464217 x 100 = -99.61%